An ancient race, the Grongi, have revived in the modern day. Godai Yuusuke is a young man who discovers the power of Kuuga that dwells within an ancient belt. He is the only one who can fight against the monstrous threat of the Grongi.

Odagiri Joe himself spoke negatively about his overall experience in playing Godai Yuusuke/Kuuga. Despite passing the audition for the titular role, he didn't like to be involved in such project. He was in consideration of resigning from being an actor throughout filming the episodes. Toei Producer, Takadera Shigenori, persuaded him finishing Kuuga would make him famous. So, Odagiri reluctantly changed his mind and stayed on until the series concluded.